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第一个as是副词,第二个as是连词as用法小结 一)as作副词,表示程度,意为“同样地”。在“asas”,“not asas”结构中的第一个as是副词,作“和与(不)一样”解。eg: Jack is as tall as his father杰克和他的父亲一样高。 He doesnt speak English asso fluently as you他的英语说得不如你流利。 二)as作介词。 1作“如,像”解。eg: They got united as one man他们团结得像一个人一样。 2作“充当,作为”解。eg: As a writer,he was famous作为作家,他是很有名的。 三)as作连词,常用来连接主句和状语从句。 1引导时间状语从句,作“当的时候”解,有“随着”之意,与while意义相近,强调两个动作同时发生;或某事一发生,另一事立即发生。eg: He shouted aloud as her ran along他一边往前跑,一边高声地呼喊。 I was startled as he opened the door他一开门,我吓了一跳。 as作连词,相当于when。eg; As a little boy (When he was a little boy)he began to learn to play piano他小时候就开始学弹钢琴。 2引导原因状语从句,作“因为,由于”解,与because的用法相近。eg; I must stop writing now,as I have rather a lot of work to do我必须停笔了,因为我还有许多工作要做。 3引导方式状语从句或比较状语从句,作“正如,(如)像”解。例eg: As in your country,we grow wheat in the north and rice in the south正如(像)你们国家一样,我们在北方种小麦,在南方种大米。(方式状语从句) When at Rome,do as Romans do入乡随俗。(方式状语从句) 4引导让步状语从句,作“虽然,尽管”解。这时从句常用倒装语序,即把从句中的表语、状语或动词原形放在as之前。eg; Strange as it may seem,it is true尽管这事看上去很奇怪,但却是真的。 Try as he might,Tom could not get out of the difficulties不管怎样努力,汤姆还是摆脱不了困境。 四)as作关系代词。 1引导限制性定语从句,用在“suchas”,“the sameas”,“asas”等结构中,常译作“像一样的人(或物)”,“凡是的人(或物)”。例eg: He wished to be such a man as Lei Feng was他曾希望做一个像雷锋那样的人。 My hometown is no longer the same as it was我的家乡再也不像过去一样了。 2引导非限制性定语从句,用来指代它前面的整个句子(即先行句),意思是“这一点”。这个分句可以位于句首、句中或句末。eg: As is well known,oceans cover more than 70 of the earth我们知道,海洋占地球面积的百分之七十以上。 五)含as的固定词组的用法 1as soon as作“一就”解,引导时间状语从句。eg: As soon as I get to Beijing,Ill write to you我一到北京,就给你写信。 2asso long as作“只要”解,eg; AsSo long as you study hard,youll make progress只要你努力,你就会取得进步。 3as ifthough常用来引导方式状语从句,作“好像,仿佛”解。如果从句中讲的是非真实情况,则用虚拟语气。eg: She loves the child as ifthough he were her own她爱这个孩子如同爱自己的孩子。 As ifthough也可用来引导表语从句,常用在“It appearslooksseems+as ifthough”句型结构中。eg; It appears as ifthough it is going to clear up看起来天要晴了。 It seems as ifthough he knew nothing about it.他好像对此事一无所知。 4as to作“关于,至于”解。eg; There is no doubt as to his honesty他的诚实是无可置疑的。 5as muchmany as作“多达”,“达到之多”解。eg: He can earn as much as 5000 dollars a month他每月能挣5000美元。 6soas far as I know作“就我所知”解,在句中作插入语。eg: AsSo far as I know,he will come here next Monday据我所知,他将于下星期一到这里来。 7as a result,as a result of表示“由于的结果”。eg: She died as a direct result of the accident她的死是那次事故的直接结果。 8,as well为“也,还”之意。eg: Come early,and bring your brother as well早点来,把你的弟弟也带来。 9so as to,soas to若跟动词原形,表示目的或结果。eg: He studied hard so as to pass the exam他努力学习以便通过考试。(表示目的) as soon as表示一。就,其中的从句通常用一般现在时表示将来时。 这个短语用的比较常用,口语和书面语都可以。它的特点是,在句子中的位置比较灵活,而且可以用于各种时态。例如: Ill write you as soon as I get there. 我一到那儿就给你来信。(一般现在时) As soon as I went in, Jason cried out with pleasure. 我一进门,Jason 就高兴的叫起来。(一般过去时)
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